[PATCH 3/3] mm/slub: Fix release all resources used by a slab cache

[Muchun Song]

The function of __kmem_cache_shutdown() is that release all resources
used by the slab cache, while currently it stop release resources when
the preceding node is not empty.

Signed-off-by: Muchun Song <songmuc...@bytedance.com>
---
 mm/slub.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/mm/slub.c b/mm/slub.c
index b73505df3de2..4e477ef0f2b9 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -3839,6 +3839,7 @@ bool __kmem_cache_empty(struct kmem_cache *s)
  */
 int __kmem_cache_shutdown(struct kmem_cache *s)
 {
+       int ret = 0;
        int node;
        struct kmem_cache_node *n;
 
@@ -3846,11 +3847,11 @@ int __kmem_cache_shutdown(struct kmem_cache *s)
        /* Attempt to free all objects */
        for_each_kmem_cache_node(s, node, n) {
                free_partial(s, n);
-               if (node_nr_slabs(n))
-                       return 1;
+               if (!ret && node_nr_slabs(n))
+                       ret = 1;
        }
        sysfs_slab_remove(s);
-       return 0;
+       return ret;
 }
 
 /********************************************************************
-- 
2.11.0